// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"

#include "ui/content_accelerators/accelerator_util.h"
#include "ui/views/focus/focus_manager.h"

namespace views {

UnhandledKeyboardEventHandler::UnhandledKeyboardEventHandler()
    : ignore_next_char_event_(false)
{
}

UnhandledKeyboardEventHandler::~UnhandledKeyboardEventHandler()
{
}

void UnhandledKeyboardEventHandler::HandleKeyboardEvent(
    const content::NativeWebKeyboardEvent& event,
    FocusManager* focus_manager)
{
    if (!focus_manager) {
        NOTREACHED();
        return;
    }
    // Previous calls to TranslateMessage can generate Char events as well as
    // RawKeyDown events, even if the latter triggered an accelerator.  In these
    // cases, we discard the Char events.
    if (event.type == blink::WebInputEvent::Char && ignore_next_char_event_) {
        ignore_next_char_event_ = false;
        return;
    }
    // It's necessary to reset this flag, because a RawKeyDown event may not
    // always generate a Char event.
    ignore_next_char_event_ = false;

    if (event.type == blink::WebInputEvent::RawKeyDown) {
        ui::Accelerator accelerator = ui::GetAcceleratorFromNativeWebKeyboardEvent(event);

        // This is tricky: we want to set ignore_next_char_event_ if
        // ProcessAccelerator returns true. But ProcessAccelerator might delete
        // |this| if the accelerator is a "close tab" one. So we speculatively
        // set the flag and fix it if no event was handled.
        ignore_next_char_event_ = true;

        if (focus_manager->ProcessAccelerator(accelerator)) {
            return;
        }

        // ProcessAccelerator didn't handle the accelerator, so we know both
        // that |this| is still valid, and that we didn't want to set the flag.
        ignore_next_char_event_ = false;
    }

    if (event.os_event && !event.skip_in_browser)
        HandleNativeKeyboardEvent(event.os_event, focus_manager);
}

} // namespace views
